This is an A-Pillar mount for the TrailDash 2 for your Wrangler JK and Wrangler JKU. May also work for the Wrangler JL but I haven't tested it.
You will need a 130mm long M8 bolt with a 1.25 thread pitch. Also, ABS or PETG recommended, as it will be in direct sunlight and/or a hot vehicle, in most cases.